British LSWR O2 class 0-4-4T. Under the Whyte notation for the classification of steam locomotives, 0-4-4 represents the wheel arrangement of no leading wheels, four powered and coupled driving wheels on two axles, and four trailing wheels on two axles. This type was only used for tank locomotives.

A 0-4-4 RT wheel arrangement, that is four driving wheels followed by a truck with four wheels (though the term has become somewhat generic; many small tank engines of various wheel arrangements have been called Forneys).

0-4-4T: 4'-8½" NYE (WACC) tundra near mouth of Soloman River between Council and Nome, Solomon, AK

The Midland Railway 1532 class was a class of 65 0-4-4T locomotives built by Derby Works between 1881 and 1886 to the design of Samuel W. Johnson. They were a development of the 1252 class.

Often described as a Forney type, the Bock #1 burned wood, which meant mounting a Radley & Hunter 9" (229 mm) diameter spark-arresting stack. Its fuel load of 1 cord of wood rode in a racks built around the water tank mounted on the frame behind the cab.

Forney locomotives almost always had four driven wheels in a rigid, non-articulated frame beneath the boiler. The most common wheel arrangement was 0-4-4, although some 2-4-4s were build for the Maine two-foot-gauge lines.

BR&L found new homes for the entire class in lumbering, a kind of railroading that suited the low axle loadings and starting traction power of the 0-4-4T arrangement.

One example of a Forney 0-4-4T locomotive built in 1902 by Baldwin Locomotive Works has been restored for daily operations on the Disneyland Railroad in Anaheim, California, as the railroad's number 5, Ward Kimball. Forney was born March 28, 1835 in Hanover, Pennsylvania.

The Midland Railway 780 Class was a class of 0-4-4T steam locomotives. They were built by Dubs & Co. in 1870, and were very similar to the 690 Class. Originally numbers 780–799. They were double-framed engines with a back tank behind the cab under the bunker.

The E class were displaced from the main passenger trains by the 4-4-4T H class in 1920, moving to lesser jobs such as trains on the Chesham branch, goods trains and engineering duties.